Glue gun



FIG. 1 is a perspective of a glue gun showing the new design;

FIG. 2 is a perspective view thereof from a different perspective;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

CLAIM The ornamental design for a glue gun, as shown and described. 